Duplicating Interface Alerts

[William Silva]

Whenever an interface goes down, Zabbix is generating 2 equal problems for the same interface, can you guys help me?

This is the Expression for Trigger
{$IFCONTROL:"{#IFNAME}"}=1 and ({Template Module Interfaces SNMPv2:net.if.status[ifOperStatus.{#SNMPINDEX}].last()}=2 and {Template Module Interfaces SNMPv2:net.if.status[ifOperStatus.{#SNMPINDEX}].diff()}=1)

I use Template Module Interfaces SNMPv2